Regenerator wall block



FIGS. 1-8 show a first embodiment of our new and original design for regenerator wall block, wherein

FIG. 1 is a front perspective view thereof;

FIG. 2 is a rear perspective view thereof;

FIGS. 3 and 4 are left and right side elevational views thereof, respectively;

FIGS. 5 and 6 are top and bottom plan views thereof, respectively; and

FIGS. 7 and 8 are front and rear elevational views thereof, respectively, and wherein

FIGS. 9-16 show a second embodiment of our new and original design for regenerator wall block, wherein

FIG. 9 is a front perspective view thereof;

FIG. 10 is a rear perspective view thereof;

FIGS. 11 and 12 are left and right side elevational views thereof, respectively;

FIGS. 13 and 14 are top and bottom plan views thereof, respectively; and,

FIGS. 15 and 16 are front and rear elevational views thereof, respectively.

The broken lines in the FIGURES represent structures in the environment of the claimed design which do not form any part of the claimed design. 

CLAIM The ornamental design for a regenerator wall block, as shown and described. 